Bandless jordan plug



NOV 9, 1937. A, DORMAN 2,098,279

BANDLESS JORDAN PLUG Filed Dec. 5, 1934 l Ill IIIII II A, t; g INVENTORBY v lgAcTORNl-:YS

Patented Nov. 9, 1937 UNITED STATES PATENT OFFICE.

BANDLESS JORDAN PLUG corporation of Massachusetts Application December5, 1934, Serial No. 756,025

5 Claims.

This invention relates to certain improvements in washing, beating orrefining engines and similar machines used in the treatment of paperstock, and more particularly to improvements in the construction oftapered grinding elements of the type used in Jordan engines, and whichare commonly known as bandless for the reason that the grinding bars orknives are attached without the use of encircling bands.

The particular embodiment illustrated is a Jordan roll or plugcomprising a tapered plug which is rotatable within a casing and bearsgrinding bars which cooperate with the interior of the casing to renethe stock, which passes through the machine in an axial direction fromthe smaller to the larger end of the plug. Filler blocks, generally madeof wood, are inserted between the grinding bars to give the properoperative depth to the bars. Grinding bars have heretofore been attachedto the plug by means of longitudinal slots in which the bars are seatedand locking arrangements in the form of bayonet joints orpin-and-shoulder engagements placed along the slots and which hold thebars securely to the plug against radial displacement. Such aconstruction is shown in my previous Patent No. 1,362,606. As the taperof the plug results in a wider spacing between grinding bars as theyapproach the large or discharge end of the plug, it is often foundnecessary to employ one or more sets of shorter grinding bars, which areinserted between the longer bars at the discharge end of the plug. Inconsequence, it has been possible to employ solid ller blocks only byinserting them between the longer bars in a radial direction, whichprevents the use of a positive or mortise engagement between the fillerblocks and bars,l the blocks being merely wedged between bars andfrictionally held.

It is an object of this invention to provide a construction in which allparts, including the woods or ller blocks, are positively lockedtogether by pin-and-shoulder, mortise or like engagements, while stillrapidly and easily assembled, and in which individual bars may beremoved with ease and without requiring that the whole device be takendown.

It is also an object of this invention to achieve the desired securityand simplicity of assembly without undue multiplication of parts, and tothis end, wherever possible, I have modied essenti-al parts of themachine to perform additional functions.

The invention consists in certain novel parts and features ofconstruction which will now be fully described in connection with theaccompanying drawing, in which:

Fig. 1 is a side view, partly in section, showing the invention asapplied to the roll or plug of a Jordan engine;

Fig. 2 is a side view, partly broken away, of one of the grinding bars;

Fig. 3 is a longitudinal section along the line 3-3 of Fig. 4, partlybroken away, showing the manner of afxing the grinding bars to the plug,and

Fig. 4 is a cross section along the line 4-4 of Fig. 1, partly brokenaway, showing the form and manner of attachment of the various parts.

Referring tothe general view of Fig. 1, the plug body I is of the usualconically tapered form, has the usual axle 2, and bears grinding bars 3and 4, thespaces between which are lled by wooden blocks 5 and B. At itsforward end is a cover plate 1 which is fastened to the plug body bymeans of the screws 8 and at its rearward or disch-arge end anothercover plate 9 similarly attached by screws I0. The particular embodimentshown has two sets of grinding bars. It is sometimes desirable to usemore than two such sets of bars of dierent lengths, and this can be doneby merely reduplicating the arrangements of the invention about to bedescribed.

The hollow plug I is formed with longitudinal supporting slots II and I2substantially coplanar with the plug axis and encircling slots I3 atright angles to them, formingr raised oblong ridges I4. The longitudinalslots are designed to seat the grinding bars and the encircling slotsare provided to permit insertion of locking projections on the bars,their forward walls being undercut so as to form shoulders I5 underwhich the bar projections may be slid.

The grinding bars 3 and 4 differ in length but are similarlyconstructed, having, as shown in Fig. 2, locking studs I6 andlongitudinal ribs I1. The manner of attaching the grinding bars to theplug body is shown in Fig. 3, the bars being inserted radially in theslots II and I2 (as shown by the broken lines and accompanying arrow)and then slid forward (as shown by the full lines and arrow) until thestuds I6 come under the shoulders I5. Wood filler blocks 5 and 6 areemployed, being so shaped as to ll the space between bars in the mannershown in Fig. 4 and so grooved as to engage the ribs I1, providing apositive mortise or tongue-and-groove engagement with the bars. Thesefillers are accurately cut to length so as to permit assembly asindicated in Fig. 1.

between the bars and until their ends also rest against the plate. -Therearward grinding bars 4 are placed ln the slots I2 and the rearward'fillers 6 slid into the open spaces between bars 3 and I in the samemanner, except that these rearward blocks and bars rest against the endsof the forward filler blocks 5 instead of against a cover plate. Thefinal step in assembly is to attach the rear cover plate 9 and fasten itby means of the screws I 0. When it is desired to remove any of thegrinding bars, the pover plate 9 is taken off and the desired parts slidout rearwardly without interfering with adjacent members.

- Itwillbe observed that the various parts are held on the plug againstlongitudinal displacement by merely extending the cover plates radiallyto act as stops, a very desirable feature, since the cover plates mustbe provided in any event to seal the plug interior against the stock,and utilizing them as stops avoids the complication of extra parts.

What is claimed isz' 1. In a machine of the class described, and incombination-a forwardly tapered frusto-conical plug having full-lengthperipherally spaced supporting slots and part-length rearward supportingslots between said full-length slots, encircling grooves at right anglesto the supporting slots, and undercut shoulders extending rearwardlyfrom the forward walls of said peripheral slots, ribbed grinding barsseated in said slots and having lateral projections engaged under saidshoulders,`forward filler blocks between the bars in the full-lengthslots and with rearward ends abutting the forward ends of the grindingbars seated in the part-length slots, rearward .filler blocks betweenthe bars seated in the partlength slots and those ,-seated in thefull-length slots, cover plates closing o the interior of the plug ateach vend'an'd extending radially beyond the plug surface so as to holdthe grinding bars and filler blocks against motion endwise of the plug,said filler blocks being complementarily grooved 'to engage the ribbedgrinding bars by forward motion along the plug.

2. In a machine of the class described, and in combination, a forwardlytapered frustoconical plug, a pair of peripherally spaced grind- -aforward filler between said pair of bars and abutting the forward end ofthe shorter bar, fillers between the pair of bars and the shorter barand abutting the rearward end of the said forward ller, and a rearwardcover plaie extending radially beyond the surface of the plug, all ofsaid bars and adjacent fillers being complementarily ribbed and groovedto hold the fiilers on the plug against radial displacement, and thebars and rearward fillers abutting said cover plate. 3. In a machine ofthe class described, and in combination, a forwardly taperedfrusto-conical plug, a pair of peripherally spaced grinding barsattached to said plug, a shorter grinding bar between said bars, lockingmechanism between said shorter bar and the plug engageable by forwardmotion ofthe bar on the plug, a forward iller between said pair of barsand abutting the forward end of the shorter bar, fillers between thepair of bars and the shorter bar and abutting the rearward end of thesaid forward filler, all of said bars and 'adjacent fillers beingcomplementarily ribbed and grooved to hold the fillers on the plugagainst radial displacement. 4. In a machine of the class described, andin combination, a forwardly tapered frusta-conical plug, a grinding barattached to said plug and extending forwardly from its rearward end, a

forward ller block adjacent said bar and having tongue-and-grooveengagement with it against radial displacement, a second grinding barextending forwardly from the rearward end of the plug and abutting therearward end of said filler block, llocking mechanism on said second barand the plug engageable by forward m0- tion of the bar along the plug,and removable means at the large end of the plug and extending radiallybeyond the surface of the plug so as to hold the second bar againstrearward movement along the plug.

5. In a machine of the class described, and in combination, the grindingbars 3 having ribs I1, the grooved filler blocks 5, the plug I havingslots I2 with shoulders I5 spaced along them, the grinding bars l seatedin slots I2 abutting filler blocks 5 and having projections Il engagedunder shoulders I 5, and the rearward cover plate 9 holding saidgrinding bars 4 against rearward displacement.

ALFRED DORMAN.

